<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>浮动布局</title>
    <style>
        .fu{
            background-color: yellow;
            overflow: hidden;
        }
        .fu>div{
            width: 100px;
            height: 100px;
            border: 3px solid red;

        }
        .z1{
            background-color: red;
            float: right;
        }
        .z2{
            background-color: blue;
            float: right;
        }
        .z3{
            background-color: green;
            float: left;
        }
    </style>
</head>
<body>
<div class="fu">
    <div class="z1"></div>
    <div class="z2"></div>
    <div class="z3"></div>
</div>
</body>
</html>